Announcement of an announcement, etc. Sinobi is a reliable Japanese retail blogger. He has posted on Twitter that there will be an announcement conference for a new Vita game called "Soul Sacrifice" on May 10 at the Tokyo International Forum venue.

The key themes of the game are "A story about magicians", "the concept of evolved co-op battles", and "high spec graphics for creating a realistic fantasy world". No word on the developer or publisher, or any other information so far.

Edit: More info.

Ah, apparently there's an illustration of the game in Famitsu. It shows 4 characters fighting against a huge monster. Definitely sounds like a Monhun clone of some sort. Apparently those who register their PSN IDs will be able to stream the conference in May. There's a website but it isn't active yet: http://pscom.jp/SOULSACRIFICE

Seems first party...

Edit 2:

There is no game article, and it is purely a 6 page paid ad, so there's no problem with posting this:

Does not look anything like Demon's Souls or Dark Souls, certainly doesn't look like a From Software game either.